Why is my material pink?

[brave nymph]

I'm following a catlike coding tutorial (https://catlikecoding.com/unity/tutorials/basics/building-a-graph/#3.2), but for whatever reason, my material is not black, but pink. I looked this up and found that it was apparently a texture mix-match, but I'm really new to this, and have no clue what the issue could be.

[thick kindle]

Chapter 3.3 is for URP which you are apparently using
3.2 for built-in render pipeline

[brave nymph]

oh. Okay, how do i fix it?

[thick kindle]

Follow the tutorial's steps in chapter 3.3 instead of 3.2?

[brave nymph]

Oh 😭

[thick kindle]

Or instead of 3.1 to be specific